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The strict form is generally held as altogether more exciting. It does not allow deviation from the limited subset of strategies Allbright considered for developing the Totteridge & Whetstone line of play. This means you only have a choice of three moves for each position, bifurcation (and beyond) is disallowed, and loops are impossible - there are many other side-effects too.

The strict form is generally held as altogether more exciting. It does not allow deviation from the limited subset of strategies Allbright considered for developing the Totteridge & Whetstone line of play. This means you only have a choice of three moves for each position, bifurcation (and beyond) is disallowed, loops are impossible, and there are various other minor side-effects too.

Perpetual Allbright's Opening is a ruleset which does not permit Allbright's Opening to be closed. There are two forms, known as the 'loose form' and 'strict form'.

The loose form of the variant, in which Totteridge & Whetstone is not allowed to be blocked, is considered by many to be a rather boring game.

The strict form is generally held as altogether more exciting. It does not allow deviation from the limited subset of strategies Allbright considered for developing the Totteridge & Whetstone line of play. This means you only have a choice of three moves for each position, bifurcation (and beyond) is disallowed, loops are impossible, and there are various other minor side-effects too.